I like to wave to everyone on 2 wheels. Unfortunately tho, Harleys rarely ever wave back. I, too, have almost given up on waving to Harley riders. That really sucks bcuz my dad rides a Harley & when I ride his Heritage Soft Tail Classic, I still like to wave & only then do I get a response from the majority of the Harley riders. When I wave at sportbikes on the Harley, they always wave back, but seem very surprised that someone on a Harley waved to them.